Black Seal LP NJ Exam UPDATED
QUESTIONS AND CORRECT ANSWERS
Carryover can lead to: - CORRECT ANSWER Water Hammer
If water leaves the boiler at 170 degrees, what temperature does it return at? - CORRECT
ANSWER 150 Degrees
The positioning control cannot function without: - CORRECT ANSWER Air
What fire tube boiler is most efficient? - CORRECT ANSWER 4 Pass
What is the purpose of a check valve? - CORRECT ANSWER Allows flow in one
direction
A solenoid valve is: - CORRECT ANSWER Is an automatic gas shutoff valve
What does PSIA stand for? - CORRECT ANSWER PSIG + Atmospheric Pressure
Water column & gauge glass should be blown down: - CORRECT ANSWER Daily
What is the most common cause of cast iron boiler failure? - CORRECT
ANSWER Cracking
What is the most common cause of problems in a hot water system? - CORRECT
ANSWER AIR
External feedwater treatment can be a ______ process - CORRECT ANSWER Cold
lime soda, hot lime soda, or ion exchange.
, Natural water may contain: - CORRECT ANSWER Solids and other pollutants
Where are the combustion gases on a serpentine boiler? - CORRECT ANSWER Below
the tubes
A steam gauge is calibrated in: - CORRECT ANSWER Pounds per square inch
What code is a heating boiler built to? - CORRECT ANSWER ASME Section IV
What test is performed on re-tubed (repaired) boiler and what is the water temp? -
CORRECT ANSWER Hydrostatic Test at 70 F
Under what ASME section is the care and operation of heating boilers? - CORRECT
ANSWER Section VI
The expansion tank in a hot water system allows for the expansion of? - CORRECT
ANSWER WATER
As the water in a hot water system expands: - CORRECT ANSWER The pressure
remains constant
The most common type of pressure control device used is the: - CORRECT
ANSWER Mercury Tube
Heavy soot on the fireside of the tubes: - CORRECT ANSWER Should be removed for
better heat transfer
When connecting a Bourdon tube steam gauge to a boiler, a pigtail is used to: - CORRECT
ANSWER Protect Bourdon Tube from steam
QUESTIONS AND CORRECT ANSWERS
Carryover can lead to: - CORRECT ANSWER Water Hammer
If water leaves the boiler at 170 degrees, what temperature does it return at? - CORRECT
ANSWER 150 Degrees
The positioning control cannot function without: - CORRECT ANSWER Air
What fire tube boiler is most efficient? - CORRECT ANSWER 4 Pass
What is the purpose of a check valve? - CORRECT ANSWER Allows flow in one
direction
A solenoid valve is: - CORRECT ANSWER Is an automatic gas shutoff valve
What does PSIA stand for? - CORRECT ANSWER PSIG + Atmospheric Pressure
Water column & gauge glass should be blown down: - CORRECT ANSWER Daily
What is the most common cause of cast iron boiler failure? - CORRECT
ANSWER Cracking
What is the most common cause of problems in a hot water system? - CORRECT
ANSWER AIR
External feedwater treatment can be a ______ process - CORRECT ANSWER Cold
lime soda, hot lime soda, or ion exchange.
, Natural water may contain: - CORRECT ANSWER Solids and other pollutants
Where are the combustion gases on a serpentine boiler? - CORRECT ANSWER Below
the tubes
A steam gauge is calibrated in: - CORRECT ANSWER Pounds per square inch
What code is a heating boiler built to? - CORRECT ANSWER ASME Section IV
What test is performed on re-tubed (repaired) boiler and what is the water temp? -
CORRECT ANSWER Hydrostatic Test at 70 F
Under what ASME section is the care and operation of heating boilers? - CORRECT
ANSWER Section VI
The expansion tank in a hot water system allows for the expansion of? - CORRECT
ANSWER WATER
As the water in a hot water system expands: - CORRECT ANSWER The pressure
remains constant
The most common type of pressure control device used is the: - CORRECT
ANSWER Mercury Tube
Heavy soot on the fireside of the tubes: - CORRECT ANSWER Should be removed for
better heat transfer
When connecting a Bourdon tube steam gauge to a boiler, a pigtail is used to: - CORRECT
ANSWER Protect Bourdon Tube from steam
